From far way this palace looks like a cross between a temple of Angkor and La Sagrada Familia, but up close it's much like a Monet painting with small pebbles and stones replacing the intricate brush strokes. Pillars, flying buttresses and grottoes carefully crafted of found stones form the 26 meters long and 10 meters high "Palais Idea".

Ferdinand Cheval (1836-1924), a French postman, began work on his dream palace in the late 19th century. As the story is told, Cheval tripped on a rock in 1879 along his mail route, picked it up and was so fascinated by its peculiar shape that he was inspired to build the imaginative palace. Coming from humble beginnings, Cheval had minimal formal education and no architectural experience, however, he was self-educated with help from the Le Magazin Pittoresque. Over the course of 34 years he enduring the criticism and mockery of his neighbors as he continued building. Pushing a wheelbarrow along his expanded mail route of 42km, he collected stones and he completed the building with no outside help. The criticism eventually turned into admiration, and tourists began flocking to Hauterives to see the Palais Idéal.

The architecture is inspired by different styles and eras, mingling together Chinese, Algerian and Northern European influences to create a fantastic and completely original castle of grottoes. "You start wondering," the postman wrote of his palace, "if you have not been carried away into a fantastic dream with boundaries beyond the scope of imagination." The fantastic dream brought to life in Le Palais Ideal is completed by fanciful statues resembling ostriches, elephants and bears.